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AH1887

Diodes Incorporated
Part Number AH1887
Manufacturer Diodes Incorporated
Description ULTRA-SENSITIVE HALL-EFFECT SWITCH
Published Feb 6, 2011
Detailed Description AH1887 MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH Description Pin Assignments AH1887 is with two Hall effect plat...
Datasheet PDF File AH1887 PDF File

AH1887
AH1887


Overview
AH1887 MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH Description Pin Assignments AH1887 is with two Hall effect plates and dual CMOS output driver, mainly designed for battery–powered, hand-held equipment (such as Cellular and Cordless Phone, PDA).
The total operation power is down to 15uW in the 1.
8V supply.
Either north or south pole of sufficient strength will turn the output on.
The output will be turned off under no magnetic field.
While the magnetic flux density (B) is larger than operate point Bop(s), the output1 will be turned on (low), the output is held until B is lower than release point Brp(s), then turned off (high).
While the magnetic flux density (B) is larger than operate point Bop(n), the output2 will be turned on (low), the output is held until B is lower than release point Brp(n), then turned off (high).
( Top View ) Out 2 1 5 Out 1 GND 2 NC 3 4 Vdd SOT553 Features Applications • Micropower operation • Operation with North or South Pole • 1.
65V to 3.
3V battery operation • Chopper stabilized • Superior temperature stability • Extremely Low Switch-Point Drift • Insensitive to Physical Stress • Good RF noise immunity • -40°C to 85°C operating temperature • ESD ＞ 4KV in human body mode • Package: SOT553 • “Green” Molding Compound • Cellular phone • PDA • Cordless phone Typical Application Circuit Vdd AH1887 Document number: DS31313 Rev.
4 - 2 AH1887 GND Output 1 Output 2 1 of 7 www.
diodes.
com August 2010 © Diodes Incorporated Pin Descriptions AH1887 MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH Offset Cancelling Pin Name P/I/O Pin # Description Out 2 (Note 1) O GND P/I NC Vdd P/I Out 1 (Note 1) O 1 Output Pin ( active Low ) 2 Ground 3 No Connection 4 Power Supply Voltage 5 Output Pin ( active Low ) Notes: 1.
Output1 responds to South pole; Output2 responds to North pole.
Functional Block Diagram Vdd Hall Plate Amp Power switch Latch Offset Cancelling Hall Plate Amp Logical Latch Out1 GND Vdd Out2 GND ...


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